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Method and device for improving video image quality

A video image quality technology, applied in the direction of image communication, color TV parts, TV system parts, etc., can solve the problems of low video image quality and loss, so as to improve the quality of video image and enhance the experience Effect

Active Publication Date: 2011-09-21
TENCENT TECH (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The implementation method adopted by the existing player will lose a lot of details in the dark in the bright scene, and the quality of the broadcast video image is not very high

Method used

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  • Method and device for improving video image quality

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In order to improve the quality of video images and improve user experience, an embodiment of the present invention provides a method for improving video image quality, see figure 1 , the content of the method is as follows:

[0053] 101: Convert the data in the YUV domain to the data in the RGB domain, obtain a histogram, and obtain the first pixel value adjustment parameter of the current frame and the second pixel value adjustment parameter of the current frame according to the histogram;

[0054] 102: Adjust each pixel value according to the first pixel value adjustment parameter of the current frame and the second pixel value adjustment parameter of the current frame.

[0055] Further, the data in the YUV domain is converted into data on the RGB domain, and the histogram is obtained. Before obtaining the first pixel value adjustment parameter of the current frame and the second pixel value adjustment parameter of the current frame according to the histogram, it als...

Embodiment 2

[0071] In order to improve the quality of video images and improve user experience, an embodiment of the present invention provides a method for improving video image quality, see figure 2 , the content of the method is as follows:

[0072] 201: Calculate the current frame and obtain the first pixel value adjustment parameter f L and the second pixel value adjustment parameter f R ;

[0073] Among them, f L Adjust the parameter for the darkest pixel value on the current frame image, f R Adjust the parameters for the brightest pixel value on the current frame image, get f L and f R Specifically include the following steps:

[0074] 201A: Convert the data in the YUV domain to the data in the RGB domain, and obtain a histogram;

[0075] Usually, the data stream output by the video decoder is in the YUV domain, and it is necessary to convert the data in the YUV domain to the RGB domain when calculating the histogram. The present invention adopts the following conversion fo...

Embodiment 3

[0091] In order to improve the quality of video images, an embodiment of the present invention provides a method for improving the quality of video images, see image 3 , the content of the method is as follows:

[0092] 301: Calculate the current frame and obtain the parameter f L and f R ;

[0093] 301A: shrinking the current frame image;

[0094] Specifically, in order to speed up the processing speed, this step adopts the MMX (Multi Media Extensions, multimedia extension) instruction set or the SSE (Streaming SIMD Extensions, streaming single instruction multiple data extension) instruction set to reduce the current frame image, specifically Other data parallel instruction sets may also be used during implementation, which is not limited in this embodiment of the present invention. By adopting this step, under the premise of ensuring the correctness of the overall algorithm, the calculation load of the subsequent steps can be greatly reduced, the CPU usage rate can be ...

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Abstract

The invention discloses a method and a device for improving video image quality, which relate to the field of digital image processing. The method comprises the following steps of: converting data of a YUV domain into the data of a RGB domain, obtaining a histogram, and obtaining a first pixel value adjusting parameter and a second pixel value adjusting parameter of a current frame; and adjustingeach pixel value according to the first pixel value adjusting parameter and the second pixel value adjusting parameter of the current frame. In the scheme provided by the invention, the data of the YUV domain is converted into the data of the RGB domain, the histogram is obtained so as to obtain the first pixel value adjusting parameter and the second pixel value adjusting parameter of the current frame, and each pixel value is adjusted according to the obtained parameter, so that the video image quality is improved, user experience is enhanced, and needs in practical application are satisfied.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a method and device for improving video image quality. Background technique [0002] With the development of digital image technology, watching videos has become an indispensable entertainment item in people's daily life, which makes people have higher requirements for the quality of video images played by video players. [0003] For this reason, some players that improve the quality of video images are provided in the prior art, such as the image quality king player. Through the above-mentioned players, users can watch video images with improved colors. [0004] The inventor finds in the process of realizing the present invention that there are at least the following shortcoming and deficiencies in the prior art: [0005] The implementation method adopted by the existing player will lose a lot of details in the dark in bright scenes, and the quality of the broadcast vide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/01H04N5/14
Inventor 刘俊梁晨
Owner TENCENT TECH (SHENZHEN) CO LTD